This graph provides a summary view of each disk's activity over
the past month. The graph plots the high, low and the weighted
average values for the percentage of time that each disk was active.
The Disk Activity Summary graph can be used to quickly identify possible
I/O performance problems and to determine possible disk balancing solutions.
The vertical bars on the graph indicate
each disk's high and low values during the month.
The weighted average for each of the disk drives is indicated
by the horizontal dash which intersects each vertical bar. The
solid horizontal line on the graph indicates the performance threshold
for the monitored system.